Breasts

Question 1

Breasts span which ribs?

Answer 1

2nd to 6th

lateral border of sternum to mid axillary line

Question 2

Breasts span which ribs?

Answer 2

2nd to 6th

lateral border of sternum to mid axillary line

Question 3

What muscles are associated with the deep breast tissue?

Answer 3

PEC MAJOR

PEC MINOR

SERRATUS ANT.

Question 4

Vascular supply of breasts

Answer 4

SUBCLAVIAN ARTERY GIVES OFF

1. LATERAL THORACIC ART
   giving off
   * lateral mammary branches

• posterior intercostal arteries give off lateral mammary branches

2. Internal thoracic artery
   giving off
   * medial mammary branches

Question 5

Lymphatic drainage of breast tissue

Answer 5

AXILLAY NODES recieve sig. majority

PARASTERNAL NODES recieve around 20%

INTERCOSTAL NODES recieve small amount

Question 6

Lymphatic drainage of skin and areola of breasts

Answer 6

SKIN:
- axillary
- inferior deep cervical
- infraclavicular

AREOLA:
- SUBAREOLAR LYNPH PLEXUS

Question 7

INNERVTION of BREASTS

Answer 7

ANTERIOR CUTANEOUS BRANCHES

LATERAL CUTANEOUS BRANCHES

of the 4th-6th intercostal nerves

• sensory, autonomic